80 meter delta loop antenna

Contact the site with comments or questions. Finally, I found the best description in the ARRL Handbook. Any and all longer to start with to better fit my backyard. Questions. The LGD 100 does not chew long on 160 meters and as I drop bands, the chewing drops like a rock. Could you or anyone add some information on the choice of balun? For example, the antenna is symmetrical and closed, so that the reception will in many cases be quieter compared to asymmetric or open antennas. Not the greatest, but it works. The main reason for using a BalUn is to make sure that the coax cable is not part of the antenna system and that it will radiate undesirable. Any antenna tuned for 80 Meters should also work on 20 and 10 meters as well. space! I don't operate 30 meters so I don't care about that. Ham Radio-A 40 meter folded dipole antenna using w 2 meter VHF Halo Antenna Assembly and Testing. Dimension "A" is the height of the antenna from the base to the apex, not the length of each of the vertical wires. Length of a full-wave Technical assistance provided by Zach. The delta loop is 264.5 feet in total length. For Amateur Radio News and Trends, please visit my news site at https://bigislandarrlnews.com.Aloha es 73 de Russ (KH6JRM). He also rips off an arm to use as a sword. right.For the feedpoint connection I used a 1-1/2" PVC pipe T This antenna is resonant at 3.650 MHz-~-~~-~~~-~~-~-Please watch: "Minelab Manticore fir. EZNEC also takes different soil conditions, construction height and wire gauge into account, so that I trust the program more than the usual simple calculation formulas c, f and k. EZNEC now requires that the suspension points be entered in a three-dimensional coordinate system. Thanks again Glenn, that all makes sense. (www.cebik.com) Do a meters were either 5x7 or 5x9 reports "both ways". ), and about 20 percentof the total QSO's were 5x5 to This Delta Loop is a three-sided antenna suspended high in the air by vertical supports, such as tall evergreen trees. http://www.arrl.org/arrl-audio-news (a wee, If you can't see the video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=MXTYTytR56A. I did learn however, both 300 The former, barely used long wire was used for the loop, for the other half I took another type of insulated copper strand. cw4X4 20m cwTF3 20m cwKH2 20m Height above ground range. A 4:1 balun should do a reasonable job of transforming the impedances to the earlier listed 50 ohm SWR values. Some people use open wire line and feed a 80 or 40 meter loop on multiple frequencies. an antenna that has not been spoken about often enough. Opinions please? L.B. using the antenna 4 years. up and would provide about the same results.To support my loop made With EZNEC I had calculated the values directly at the feed-in point of the antenna. long spans - just ask me!My loop is fed about mid-span and the coax For the latest Amateur/Ham Radio news and information, please visit these websites: http://www.HawaiiARRL.info. The decreasing SWR values with increasing frequency measured with the miniVNA, which could not be seen in the EZNEC diagram, are certainly due to the cable losses of the 30m long RG58 / U. The antenna is a multiband antenna without traps, which can be fed with normal RG58 coax, and costs almost nothing. HF & ShortwaveLicense StudyLinksMidi MusicReading RoomRepeater Basics Repeater Your sag will depend on the type and size of This was designed for 80 meters, not 160. Loops are quiet antennas compared to verticals and dipoles and are omni-directional. http://www.arrl.org. End2 of sub-wire 1 is identical to End1 of sub-wire 2, etc. I am using a home brew tuner, however old Johnson/Viking match Boxes are made of this type.There is no electrical connection between the TX output and antenna, only magnetic coupling. 43-45. the pulleys) for final wire sag adjustments. Jim / W6JHB. At 40 and 80 m was unfortunately nothing for me, because my half dipoles for the two bands had been demolished for several years, and these were not lacking because of my VHF / UHF or space activities anyway. Not the best antenna, but it works. Well, the That was then 86 m. The above SWR diagram was calculated assuming an input impedance of 50 ohms. 10 and 20 meters, I was also pleased with a weekend of experimenting on 15 (I realize the software may provide a better answer, but it does not explain things). The site will be something of which everyone involved can be proud to say they were a part. to take up a bit more slack from one pulley (the wire pulls through all Experimenting with wire antennas In the following picture the SWR can be seen again for the range 3-4 MHz in high resolution. https://bigislandarrlnews.com. Am I glad I just happened to build it when I didyou bet! Delta Loop Skywire Antenna 80m - 10m The Delta Loop (Skywire) Antenna Legends, Theory and Reality German Version Summary Karl, DK5EC, describes the construction of a simple multiband delta loop antenna (skywire) for the 80m - 10 m bands. "HO-HO-HOHPLs" by W4RNL The chart below will give you the actual dimensions per band so you can see if you can fit this type of antenna at your location. /* Ad banner 160 x 600 */ watt manual tuners (MFJ and Vectronics) that I used took some time to tune Branches are one of the main problems to be dealt with. Believe me when I say, it was the best all ), then coax all the way? Also, a wonderful DX antenna, as I have worked as far away as Australia, on 20 meters, and as close in as 50-300 miles at night during our 80 meter rag chew. Hey Jerry - I'll bet you didn't see any winds like that back in Martinez, eh? On the other bands it works well enough to suit me. Although I have mostly tried this antenna on the job quite fast on all bands 80-10 meters.My tribander will google_ad_client = "ca-pub-9377297764300878"; No it does not outperform a yagi but it will load up 80 thru 10m(except 30m) using the ATU in my TS450. requires no special feed networks, only a transmatch, coax and some As a comparison, I have shown the results of the Deltaloop with chicken ladder below, with very interesting results and conclusions. Add an antenna "tuner", a sturdy rig, such as the Yaesu FT-817, a microphone/cw key, and a simple grounding system, and you have a fully functional, nearly invisible ham station in your backyard. http://www.arrl.org/arrl-audio-news (a weekly podcast which is updated each Friday afternoon). That has left me with the last minute idea 80 meter delta loop as my only antenna. To build this antenna you need a lot that is at least 100 feet across. My favorite vertical loop for portable and fixed use is described below. If we make the loop much longer or shorter, we would end up with the antenna being unsuitable for some of the bands. What were the most popular text editors for MS-DOS in the 1980s? Never will Go back to a dipole or G5RV again. A strong step with my short legs = 1 m. Anyhow, I expected to be completely wrong in the first attempt, because I could certainly only enter the Earth conditions in the EZNEC program very inaccurately. wire to the top of masts (Figure A below). it has out-performed my OCF dipole, dipole and inverted L, when ALL bands from 10-160 are taken into account. I then repeated the same measurement assuming an input impedance of 200 ohms, hoping that the upper band SWR values would improve, i.a. out the map below to see what it has done for me so This has all sorts of nasty effects, think of: interference, EMI, RFI disrupted radiation pattern of the antenna, restless noise level. As it turned out, I was not so far off with my guessed values. The transceiver has an impedance of 50 Ohm, so an impedance transformation must also be made. This configuration is best suited for working long haul DX. 20m.I am primarily a cw op but I do get on phone as On the other hand, the SWR, to my delight at 40m, improved to an acceptable 1: 1.7. Click here for the order form: Order Form, Telephone: (610) 317-9779 Address: 1843 Renwick Street Bethlehem, PA 18017. For the latest Amateur/Ham Radio news and information, please visit these web sites: http://www.HawaiiARRL.info. Each of the three sides is a shade over 88 feet long. Do you already have specific dimensions in mind? found to be so appealing about this antenna was that it was fairly This will show the true potential of this fine HF antenna. This is because not only does the coaxial cables sheath radiate while transmitting, but the sheath also acts as a receiving antenna. google_ad_slot = "1982258389"; The delta loop was fed at the lower left hand corner with two-conductor #18 AWG speaker wire from Radio Shack. Due to the high resolution, even the theoretical resonance value or SWR of 1: 1 with 50.4 ohms is now reached. Bernie does an excellent job of explaining the pros and cons of this popular HF antenna from the late Louis Varney (G5RV). In fact you can find this triangle or Delta configuration, in the ARRL antenna handbook 19th Edition . The next step was a site survey through my garden. The diagram indicates a high narrow band of the two wish bands. The 80 meter Deltaloop antenna is suspended in a triangle, so in many cases the antenna needs limited space. Originally, I had inserted the Y-axis with 30m in the Wires table described above, so without first calculating the actual theoretical resonance length. Maybe one of you will make it click. Try it some time! (Ref. If necessary, both bands could also be operated without additional adaptation. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); 7,25 The Netherlands drops 30 feet straight down into my shack. Note: Dimension "A" is not the length of the wires on, the sides of the Delta Loop but only the height the apex. What is the height? night.It is amazing how much louder some stations are on If you have sufficient space and a few trees, then this 80 meter full wavelength loop antenna is for you. Thank you for visiting my Amateur Radio Blog. Anyone do the same Delta but horizontal? The antenna is a 60 foot dipole, bent into a rectangle, and fed at one corner with Radio Shack TV Twinlead into a MFJ 4:1 balun and tuned with a LDG Z11 Pro autotuner. By "tuned for 3.55MHz" I meant trimmed. Manual 1:1 BalUn 150 Watt for dipole antennas, Manual 1:1 BalUn 800 Watt, for dipole antennas, Manual 1:2 BalUn 600 Watts for Delta-loop & Quad-loop antennas, Manual 1:9 UnUn 600 Watts for long-wire antennas, Manual 1:49 UnUn for End Fed antennas 100 Watt, Manual 1:49 UnUn for End Fed antennas 250 Watt, Manual 1:49 UnUn for Mini End Fed antenna, Antenna impedance Theory and practice examples, Antenna radiation pattern depending on length and height, 80 meter Deltaloop antenna including 1:2 BalUn DIY kit, Be the first to review 80 meter Deltaloop antenna including 1:2 BalUn DIY kit. "Loop Antennas", ARRL Antenna Book, 16th edition, pages Well, some.. depending on your choice of The antenna is symmetrical and closed so that in many cases the reception will be quieter compared to asymmetrical or open antennas. The G5RV is an excellent choice for the 20 meter band. To build the largest and most complete Amateur Radio community site on the Internet - a "portal" that hams think of as the first place to go for information, to exchange ideas, and be part of whats happening with ham radio on the Internet. Overall I thought this was a fantastic antenna. Delta-loop antenna 80m Legends, theory and practice In the following, the construction of a simple multiband delta-loop antenna for the bands 80-10m is described. Debugging SM0VPO's spiral loop antenna build. They can also be in the vertical plane and are most often in the same shapes with the delta being very popular as it has both vertical and horizontal polarization. All these comments are about a vertical Delta-loop. The performance by CW/digital band segment of this antenna is: These results were obtained over real, average ground. The project is straight forward, simple, and gives you emergency communications while you peddle down the road. For the latest Amateur/Ham Radio news and information, please visit these websites: http://www.HawaiiARRL.info. I recently had great results with a delta What is the symbol (which looks similar to an equals sign) called? was the same as "received" most of the time. coax.Silicon caulk was then applied to the connections for CW, SSB, FT8, etc.? I regret only Why the obscure but specific description of Jane Doe II in the original complaint for Westenbroek v. Kappa Kappa Gamma Fraternity? Brought the twin lead into the shack to the tuner via the built in 4:1 balun. lived on 10 acres in the country, I decided to make my horizontal loop 80 Meter band dipole antenna kit, including 150 Watt 1:1 BalUn, 80 Meter band dipole antenna kit, including 800 Watt 1:1 BalUn, Pressure compensation valve, keeps moisture out, 30 meter Quadloop antenna including 1:2 BalUn DIY kit, 15 meter Quadloop antenna including 1:2 BalUn DIY kit, 12 meter Quadloop antenne inclusief 1:2 BalUn zelfbouw kit, 10 meter Quadloop antenna including 1:2 BalUn DIY kit, 12 meter Deltaloop antenna including 1:2 BalUn DIY kit, Winding wire 18 AWG 4x 85cm PTFE 19 x 0.25 mm copper Silver plated, Core wrap wire 1.5 mm 1.5 mtr. It is made from 12-gauge insulated wire. However, they can also be very useful as antenna supports. But since my main interest is in 80 / 40m operation, I have then made me to connect the cable at the feed point without impedance matching. Since a few months ago in our OV G25 the antenna analyzer fever broke out, I wanted to not only simply set up the intended antenna, but also theoretically calculate with antenna programs, measure the antenna after the set up with the Anlaysator and thus compare theory and practice. Maybe it has to do with the unequal sides and tilt? Hamuniverse.com uses Green Geeks Web I also have a home grown horizontal Loop up. At the top of the tower on the west side was my just erected 80 meter delta loop which was kind of a last minute before winter install "just because" I had the wire, coax, and 4:1 current balun sitting around doing nothing. I can use it on 160 with a tuner though I run low power when doing so. I had to agree fully later. I found a 60 meter resonance for this 160 loop (third harmonic) and it did not work as well as a low dipole cut for 60 meters. strength, durability and because I may use an amp) terminates on the KL7JR, 1. According to Rich, this antenna is resonant at 3.650 MHz. 5x1 quality "both ways".For those doing the math, call the remaining 5 Likewise, the advantages of a coaxial cable compared to a chicken ladder with Matchbox for this type of antenna are practically and metrologically documented. top (apex about 50 feet or so). Moving to any angle is easy with EZNEC. Jim you are absolutely correct. At the end of the quarter wave matching section of 75-ohm coax, you can attach a random length of 50-ohm coax, again user supplied, which will be run to your rig. (Note: #1 is available to (This includes any inappropriate posts on a topic, as I cannot monitor every topic.) Since a loop antenna next to the dipole is probably the simplest antenna shape, I could use EZNEC or with the help of the simple and precise introduction of the necessary parameters and let the antenna calculate. Nice and simple and it works good enough for me. For the other two suspension points are the TV antenna mast on the house roof and a high spruce at the rear edge of the property. It loads on 80-10 meters, but I haven't tried making any QSOs on 80 with it. well.I built the antenna out of solid 14 gauge copper wire 1 is suspended at the end of End1 at the Versa Tower (X = 0m, Y = 0m, height Z = 15m) and ends at the end point End2 at X = 5, Y = 20, height = 6m. This antenna is also rated at the full legal limit on all modes. 1: 1 balun, wire strand, insulators for the bracing and rope clamps I had too. This Op woensdag is HF Kits gesloten. How to choose antenna "pigtail" pragmatically? Take care. Here's a way to use Amatuer/Ham Radio while you work on shedding a few pounds in useful exercise. Trapped dipole for 40-80-160 meters. The DXZone is the largest human created and maintained library of web sites dedicated to Amateur Radio, currently lists 20.000+ links organized into 600+ categories and subcategories. I had played with the delta loop a bit before the wreck but now that it is my only antenna I checked it out further. At the top (90 ft) on the east side of the tower was a pulley which held my 160-6 meter homebrew OCFD. BD4.DX worked on 17 meters was KL7 and OH1. Your reward will be quiet HF antenna with a bit of gain over a dipole. Just to add my two cents worth, I have seen very good matching and good performance with the loop antenna, when I used link couple type tuner, instead of regular "T" match type. stuff to build it was on hand-no cost! eHam.net is a community web site for amateur (ham) radio operators around the world. The telegraph wire is #6 AWG A classic. Also, the higher resolution at 3.6 MHz (next picture) is very similar to the theory, with slightly higher input impedance (green curve) or SWR (red curve). The direction of fire is broadside to the antenna. Cebik W4RNL goes into Each of the three sides is a shade over 88 feet long. thank you for bringing this to our attention. versions, say 75% of a wavelength may also work fine if you don't have the Smaller gauge wires will break if pulled too tight or used on In my old edition of the Rothammel there is not much in it, it is limited to loops with a vertical arrangement, such. Now with a handy mounting plate for the toroidal cores, so gluing is no longer necessary. Experimental Wire, Copper/Kevlar Wire, Copper/Stainless steel Wire, Your email address will not be published. It was perched on a 2.5 inch OD, 1/4 inch thick wall, moly steel mast and turned by a Tailtwister. 80 Meter Full Wave Loop Ham Radio Antenna or Amateur Radio Antenna. For 80 m, the shift of the resonance is still ok, but for the higher bands, the resonance frequency wandered outside of the amateur radio ranges. Tune Around!SEARCHCQ-Calling All Cubical quads. Although Varney envisioned his design primarily as a 3/2 wavelength antenna for the 20 meter Amateur Radio band, radio amateurs have used the antenna for multiband use. On the internet I got some tips, partly with contradictory legends, which made me curious. The rogue wind of 12/17/12 bent the moly steel mast 90 degrees to the east and that resulted in the boom of the C 31 XR being parallel to the tower. an antenna that has not been spoken about often enough. Feedline and balun for 80m horizontal delta loop, New blog post from our CEO Prashanth: Community is the future of AI, Improving the copy in the close modal and post notices - 2023 edition. 80 meter full wave square horizontal loop feed by 600 ohm ladder line from link coupled balanced tuner. The 80m delta loop is a field day team's secret weapon to run 80 and 40m frequencies. the loop as compared to the Carolina Windom. Until Monday, 12/17/12,when a 102 MPH windstorm hit my QTH I had four HF antennas at my QTH in Eastern Oregon. Using a 160 meter full wave loop in that fashion is likely to be counterproductive. He is peaking S8 and was louder the other 573. One is to use an open wire feeder, something like 450 ohm twin lead. In the following, the construction of a simple multiband delta-loop antenna for the bands 80-10m is described. I have a 80 Meter Delta Loop up 50 feet fed with RG-213 and a 4:1 balun. Loop Antennas and Calculator. google_ad_width = 160; Use a TV coax and balun for a poor-man's OCFD? The goals of the project were to provide an optimized antenna for 40m, 80m, 20m, and all other HF ham bands, in that order of priority. I don't have 6 meter capability (yet!) Plans and projects on home made delta loops antennas, A Vertically Polarized Delta Loop for 40m, DL-Special DX Antenna - 2 Delta Loops in Phase. long bottom extension of the PVC T to remove strain on the hanging commercially made baluns. I use "about" because exact numbers are not that critical according to my results. Other forms would be conceivable, then just with appropriate compromises. TrackBack URI. Should I re-do this cinched PEX connection? The result is to be admired in picture below. 20-21 A bidirectional,40 meter 2-element Delta Loop array made from wire and coax provides a better way to snare some DX at modest cost. Although you can erect this loop by yourself, you may want some help to speed up the construction and rigging of this large HF antenna. ARRL Antenna Book page 5-17) the antenna wire as Feedback QST May 1996, p. 48. Once you try a loop antenna you will know why they are so popular with old timers but still a secret to newcomers. Best antenna I have used in 50 years of hamming. The Ultimate Guide to Working Ham Radio Satellites, My 3 Favorite Antennas for Portable Ham Radio (HF), Slot Antenna with parabolic dish for 2m and 70cm, Installing a new vertical ham radio antenna, Off Center Fed Dipole (OCF) Antenna-Ham Radio Q & A, Building a copper-tape VHF window antenna. All information, images, product configurations, and documents on this website are the sole property of Palomar Engineers, Inc. Any reuse or redistribution of the contents of this website are strictly forbidden without authorization from Palomar Engineers, Inc. 1-3/4" Nylon Pulley and 1/4" Spring Hook Set for antenna wire installation, 160-10 Meter Loop Antenna System with 4:1 Balun and Choke Combo, 1.8-30 MHz, 1.5KW/5KW PEP, 40-6 Meter Loop Antenna System with 4:1 Balun and Choke Combo, (40, 20, 17, 15, 12, 10, 6 meters) 500/1.5KW/5KW PEP Options, 50:100 (2:1) CUBE Balun/Unun 1.8-61 MHz, 2KW/5KW, Loop Antennas, 50:112 (2.25:1) CUBE Balun 3-30 MHz, 1.5KW/3KW/5KW, 50:200 (4:1) CUBE Balun, 1.8-61 MHz, 1.5KW - Loop, OCF, Folded Dipole useful to 200 MHz, 80-10 Meter Loop Antenna System with 4:1 Balun and Choke Combo, 3-30 MHz, 500/1500/5000 PEP Option, Bullet 50:100 (2:1) HF Balun, .1-61 MHz, 500/1500 Watts PEP, Loop Antenna, Bullet 50:200 (4:1) HF Balun, 1.8-61 MHz, 500/1500 Watts PEP, Loop, OCF, ZEPP, Bullet Hybrid (4:1) HF Balun + 1:1 Choke, 1.8-61 MHz, 500/1500 Watts, OCF, Loop, Folded Dipole Antennas, HF Loop Antenna Wire Kits (160-10 meters), Hybrid 1.5:1 Current Balun + 1:1 Current Balun in one enclosure, 1.8-61 MHz, 1.5/5KW PEP - Loop Antenna, Hybrid 2:1 Current Balun + 1:1 Current Balun in one enclosure, 1.8-61 MHz, 1.5/5KW PEP - Loop Antenna, MAXI-CHOKER Coax Line Isolator/Choke, 1-61 MHz, 3KW/5KW, up to -60 Db Common Mode Rejection, Static Bleeder Option, Maxi-Choker, 1:1 Line Isolator 3KW, 7-54 MHz Optimized for Wide Band Log Periodic, HF & 6M Beams. google_ad_height = 600; Can you still use Commanders Strike if the only attack available to forego is an attack against an ally? No balun or choke coils necessary. Delta Loop Antenna Radiation Patterns A full-size Delta Loop, fed in the bottom corner, is a good low angle radiator and is great for working DX. The same resonance points are displayed in both diagrams! To my delight, theory (EZNEC calculations) and practice (miniVNA measurements) were not far apart, comparing the above EZNEC diagram for 1 30 MHz with the image below. How does the performance of the vertical delta loop compare to an 80 meter horizontal square or rectangular loop? Thats actually all you have to do to start the calculations and see the results. Hi Jerry, I had a similar antenna up for a while. Triangle versus square - Some people were asking if the triangle was a valid configuration for the horizontal loop. By varying the location of the feeding point within the triangle changes the radiation angle of the antenna. According to Rich, this antenna is resonant at 3.650 MHz. Say you don't have the room for a full wave antenna then . I've worked Europe and Australia on 30 with it, South America and the Canary Islands on 40, and I've worked a lot of DX on 17-10 with it too. Very quiet receive antenna. The transceiver is an Icom 7300 which tunes SWR 3:1 or less. ).Also, my log indicates "sent" report WOW! i have a VERTICAL delta loop cut for 80 meters.Fed at the corner. It outperforms dipoles and OCF antennas. easy it is to build and how well it performs. //-->. The 40m band looks similar, but with a worse but acceptable SWR without impedance matching: Below are the EZNEC calculated directivity diagrams for all shortwave bands. Balun in the air at feedpoint (4:1? Will try to get it in the air! A full-size Delta Loop, fed in the bottom corner, is a good low angle radiator and is great for working DX. Here I have divided the two long wires again into 2 parts, because I wanted to simulate the intentional sagging of the long wires here. Antenna for Condo Backyard-Stealth. wire used. It was slightly angled at maybe 25 degrees since the tower was only 60 ft tall. That is assuming the Band Gods did not wake up on the wrong side. listening to A92HK on the loop. Best feed point is 1/4 wavelength (246/f(mhz)) from the top point down one side. There are several ways to solve this problem. I wasn't sure if all "floaters" would You will also need a feed line choke or better yet, just get the Hybrid 4:1+1:1 in a single box. rev2023.5.1.43405. all" (you can't work them all! I am new to HF. One end of the base of the antenna is not connected at the factory. Copy the n-largest files from a certain directory to the current one, A boy can regenerate, so demons eat him for years. Are there any canonical examples of the Prime Directive being broken that aren't shown on screen? this antenna. As a wire length, I roughly took the values from the EZNEC calculations, but I only measured those with my stride length. also "the longer the wire the better" may also fit some loops.Since I so will take Stev''s word that it loads on that band as well. KL7JR Sloping Vertical Delta Loop 80-6 Meters "KL7JR Sloping Vertical Delta Loop 80-6 Meters" Imagine 9 bands on one wire antenna! I've seen strong recommendations for using 300 ohm twinlead and a balun near the ground, but others still say the longer coax run isn't a problem. This 1:2 BalUn scores very well both in terms of common mode current attenuation and impedance matching. Loop Antenna Notes.updated Dec. 2012 . I agree with the praise of the true differential tuner like the Johnson Matchbox, and also with the greatest bargain of all time the Radio Shack 300 ohm twin cable. Comment document.getElementById("comment").setAttribute( "id", "a83b46cfc120fc48eba63655d8cdb058" );document.getElementById("bf02c2270e").setAttribute( "id", "comment" ); Save my name, email, and website in this browser for the next time I comment. 20 meters is kind of odd, I've worked DX there, but it seems like it doesn't do well to the west. In fact, the upper band values improve here, but the SWR gets worse at 80 meters. Since my wire was very heavy Ideally you would want to run the balanced line all the way to your antenna tuner. The delta loop should be at least 1$\lambda$ in circumference for the lowest band. A Hawaii-based Amateur Radio Antenna Blog focusing on the theory, design, and use of homemade antennas. Is it better to run 300 or 450 ohm line down and then place the balun near the entry (with a short run of coax) -- or is it OK in this case to mount the balun in the air with 50 - 60 ft of coax? So I let the antenna down from the spruce side (less fron work than the crankshaft at the Versa Tower) and lengthened the wire by 2.70. google_ad_client = "ca-pub-9377297764300878"; I use a 1:1 balun. Theoretical considerations and preparations. The actual length of the individual wire segments and thus the total length I could in the o.a. thank you for bringing this to our attention. far! I know it tunes 40 and 80 meters quite fast! Why not equip your bicycle for 2 meter/70 cm mobile operation? I had the chance to compare a 130ft horizontal loop with a 130ft end fed and they were pretty much a wash on 40-10 with the EF being easier to hang. As indicated in the handbook, even with me the antenna cost a penny, because I could take everything of my crafting box. All these comments are about a vertical Delta-loop. This BalUn has a fantastic common mode current attenuation of over 30 dB.

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